Hi, ! I am sorry you are dealing with these internal tremors. I know that at least a few of our members have shared about experiencing internal tremors. A number of individuals mentioned experiencing them especially at bedtime or during the night, so they tried sleep aid treatments, like CBD products and melatonin. But, please do check with your physician before trying any new treatment, even 'natural' ones.
Even though others may not be able to see the internal tremors, they are treated in a similar manner to more physically visible tremors. Here's some basic information on tremors and possible treatment options -- https://multiplesclerosis.net/symptoms/tremor.
If you haven't done so already, I would definitely talk to your doctor about this issue. He/she should have some ideas for how to treat and manage the tremors and muscle fatigue.
I hope this helps!
Best, Erin, MultipleSclerosis.net Team Member.